Symfony2语言环境检测：在会话中不考虑_locale

Question

我试图实现一个检测用户首选语言（考虑Accept-Language标题）的LocaleListener并将其存储在会话中以避免检查每个请求。我已经开发了下面的代码来实现：

public function onKernelRequest(GetResponseEvent $event) { 
    $request = $event->getRequest(); 

    if (HttpKernelInterface::MASTER_REQUEST !== $event->getRequestType()) { 
     return; 
    } 

    $preferredLocale = $request->getPreferredLanguage($this->availableLocales); 

    if ($this->container->has('session')) { 
     $session = $this->container->get('session'); 
     if (!$session->has('_locale')) { 
      $session->set('_locale', $preferredLocale); 
     } 
    } else { 
     $request->setLocale($preferredLocale); 
    } 
} 

的代码工作，首选语言被存储在会话，但symfony中没有考虑存储在会话翻译字符串的区域。就我而言，我的首选语言是“pt_BR表示”当我逃脱

{{ app.request.locale }} 

symfony的是逃避“恩”。 symfony不应该考虑存储在session（'_ locale'）中的值来定义请求区域设置吗？这是一个正确的行为？我怎么能做到这一点？

Answer 1

这里是工作语言监听器。第二种方法是将语言更改为用户选择的用户偏好。如果您的用户没有设施来定义他们的语言，您可以省略此方法。

<?php 

namespace Acme\UserBundle\EventListener; 
use Symfony\Component\HttpFoundation\Session\Session; 
use Symfony\Component\Security\Http\Event\InteractiveLoginEvent; 
use Symfony\Component\HttpKernel\Event\GetResponseEvent; 
use Symfony\Component\HttpKernel\HttpKernelInterface; 

class LanguageListener 
{ 
    private $session; 

    public function setSession(Session $session) 
    { 
     $this->session = $session; 
    } 

    /** 
    * kernel.request event. If a guest user doesn't have an opened session, locale is equal to 
    * "undefined" as configured by default in parameters.ini. If so, set as a locale the user's 
    * preferred language. 
    * 
    * @param \Symfony\Component\HttpKernel\Event\GetResponseEvent $event 
    */ 
    public function setLocaleForUnauthenticatedUser(GetResponseEvent $event) 
    { 
     if (HttpKernelInterface::MASTER_REQUEST !== $event->getRequestType()) { 
      return; 
     } 
     $request = $event->getRequest(); 
     if ('undefined' == $request->getLocale()) { 
      if ($locale = $request->getSession()->get('_locale')) { 
       $request->setLocale($locale); 
      } else { 
       $request->setLocale($request->getPreferredLanguage()); 
      } 
     } 
    } 

    /** 
    * security.interactive_login event. If a user chose a language in preferences, it would be set, 
    * if not, a locale that was set by setLocaleForUnauthenticatedUser remains. 
    * 
    * @param \Symfony\Component\Security\Http\Event\InteractiveLoginEvent $event 
    */ 
    public function setLocaleForAuthenticatedUser(InteractiveLoginEvent $event) 
    { 
     $user = $event->getAuthenticationToken()->getUser(); 

     if ($lang = $user->getLanguage()) { 
      $this->session->set('_locale', $lang); 
     } 
    } 
} 

在services.yml

：

services: 
    acme.language.interactive_login_listener: 
     class: Acme\UserBundle\EventListener\LanguageListener 
     calls: 
      - [ setSession, [@session] ] 
     tags: 
      - { name: kernel.event_listener, event: security.interactive_login, method: setLocaleForAuthenticatedUser } 

    acme.language.kernel_request_listener: 
     class: Acme\UserBundle\EventListener\LanguageListener 
     tags: 
      - { name: kernel.event_listener, event: kernel.request, method: setLocaleForUnauthenticatedUser } 

哦，你必须在config.yml定义一个未定义的fallback_language得到它的工作。

framework: 
    translator:  { fallback: "undefined" } 
    default_locale: "en" 

Answer 2

从symfony 2.1开始，语言环境不会存储在会话中，而是存储在请求中。你可以做些什么来解决它：

• 恢复保存语言环境的旧方式。你可以阅读如何做到这一点的upgrade file

• 编辑LocaleListener于区域设置存储在请求：

  if (!$request->attributes->has('locale')) { 
      $request->setLocale(...); 
  }